Bosch D-Jetronic

[Mike Morrin]

At 04:10 pm 26/05/99 -0700, James Thomas wrote:
> The ITB rules do not allow us to substitute alternate injection systems
> but your suggestion of a digital control unit is interesting.  What 
>information do you have regarding retrofitting a digital unit to the 
>K-Jet system?

I presume you mean d-jet.  Most any of the aftermarket systems will work,
but one point to watch is the injector flow rate.  The original d-jet
injectors have a much greater flow rate (for the engine size) than most
modern systems.  This causes problems with getting the idle right unless
the injectors are pulsed only one per 720 crank degrees.  Many aftermarket
ECUs pulse the injectors every 360 degrees.

You can overcome this by fitting smaller injectors, or find an ECU designed
for a camshaft driven trigger.

BTW, do you have any info on the correct calibration procedure for the LVDT
(map sensor) used on the D-jet systems?  The only (unofficial) procedure I
have seen is to adjust for correct HCs at 2500 rpm unloaded.

Mike Morrin
1975 Jaguar XJ-S with d-jetronic